Ping... From: Gao Pan <mailto:b54642@xxxxxxxxxxxxx> Sent: Friday, September 11, 2015 6:43 PM > To: wsa@xxxxxxxxxxxxx; u.kleine-koenig@xxxxxxxxxxxxxx; > shawnguo@xxxxxxxxxx; kernel@xxxxxxxxxxxxxx > Cc: linux-i2c@xxxxxxxxxxxxxxx; Li Frank-B20596; Duan Fugang-B38611; Gao > Pan-B54642; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Subject: [Patch V5] ARM: dts: imx6qdl-sabresd: add i2c pinctrl gpio state > for bus recovery > > When i2c bus SCL/SDA are stuck low during transfer, the i2c pinctrl > should be configured to gpio mode to do bus recovery. > > Genenally, we can use sleep state for bus recovery. But it's not a good > choice to use sleep state here because it will be confused. This patch > introduces a dedicated gpio state. > > Signed-off-by: Fugang Duan <B38611@xxxxxxxxxxxxx> > Signed-off-by: Gao Pan <b54642@xxxxxxxxxxxxx> > --- > arch/arm/boot/dts/imx6qdl-sabresd.dtsi | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi > b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi > index 944eb81..6e97018 100644 > --- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi > +++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi > @@ -172,8 +172,11 @@ > > &i2c1 { > clock-frequency = <100000>; > - pinctrl-names = "default"; > + pinctrl-names = "default", "gpio"; > pinctrl-0 = <&pinctrl_i2c1>; > + pinctrl-1 = <&pinctrl_i2c1_gpio>; > + scl-gpios = <&gpio5 26 0>; > + sda-gpios = <&gpio5 27 0>; > status = "okay"; > > codec: wm8962@1a { > @@ -393,6 +396,13 @@ > >; > }; > > + pinctrl_i2c1_gpio: i2c1grp_gpio { > + fsl,pins = < > + MX6QDL_PAD_CSI0_DAT8__GPIO5_IO26 0x1b0b0 > + MX6QDL_PAD_CSI0_DAT9__GPIO5_IO27 0x1b0b0 > + > > + }; > + > pinctrl_i2c2: i2c2grp { > fsl,pins = < > MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b8b1 > -- > 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
